The verdict in three sentences
Custom management software for a London property developer costs in 2026 between 60,000 and 160,000 EUR (programmes, units, reservations, deeds, buyer portal). The timeline is 6 to 10 months, given how long the chain is (sales, notary, bank, stage payments). The key gain: managing sales and stage payments in real time to secure cash flow and shorten the reservation-to-deed delay.
The modules that shape the price
2026 order of magnitude for a developer running 3 to 8 concurrent programmes.
| Module | Key function | Range EUR | Timeline |
|---|---|---|---|
| Programme & unit management | Price grid, stock, custom works | 12,000 - 28,000 | 6-9 wks |
| Sales tracking | Reservations, options, pipeline | 10,000 - 24,000 | 6-8 wks |
| Buyer portal | Documents, custom works, tracking | 9,000 - 22,000 | 5-8 wks |
| Stage payments & guarantees | Schedule, follow-ups | 10,000 - 22,000 | 6-9 wks |
| Notary/bank integration | Deeds, financing, exchanges | 8,000 - 20,000 | 5-8 wks |
| Executive reporting | Margin, sell-through, cash | 6,000 - 16,000 | 4-6 wks |
Cash flow tracking: where the tool pays off
A developer's cash flow depends on stage payments triggered as works progress. A billing delay means immobilized cash.
| Item | Without dedicated tool | With custom software |
|---|---|---|
| Reservation -> deed delay | 9 - 14 weeks | 6 - 10 weeks |
| Average stage-payment delay | 3 - 5 weeks | < 1 week |
| Unconverted option rate | 18 - 25 % | 10 - 15 % |
| Monthly reporting time | 3 - 5 days | a few hours |
| Payment schedule errors | frequent | near zero |
Mini case study
Marc runs a developer in London, 5 active programmes, 240 units in sales, average price 285,000 EUR. His stage payments run on average 4 weeks late, immobilizing a costly share of cash on 68 M EUR of volume. By bringing that delay to under a week, he advances the collection of about 5 M EUR by 3 weeks; at a 6 %/year carry cost, that is about 17,000 EUR saved per cycle, and over the year more than 60,000 EUR. Add the +5 points of option conversion (12 extra units signed), and the project at 118,000 EUR is paid back in 12 to 16 months.
FAQ
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Why is the development timeline so long?
The developer chain covers sales, custom works, notary, bank and stage payments. Each link requires precise rules, hence 6 to 10 months for a full scope.
Is the buyer portal really useful?
Yes, it centralizes documents, custom-works choices and construction tracking. It reduces support calls and smooths the journey to deed signing (9,000 to 22,000 EUR).
Can notary and bank exchanges be integrated?
Yes, via connectors and structured document exchange. This module costs 8,000 to 20,000 EUR and secures tracking of financing and deeds.
How does the tool improve cash flow?
By triggering stage payments at real construction progress, without delay. Cutting the delay from 4 to 1 week advances collection and lowers carry cost.
What annual budget after delivery?
Budget 12 to 16 % of project cost per year, typically 10,000 to 22,000 EUR/year of maintenance and enhancements depending on the number of programmes.
Let's scope your project. Tell us your number of programmes, unit volume and stage-payment needs, and we will frame scope, indicative budget and timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
